HTML+CSS+JavaScript

a{color:#D10000;}
a:hover{ text-decoration:none}
/* MAIN MENU_header*/
#menu_top{padding-left:250px;
padding-top:25px;}
#menu_top a{
display:block;
float:left;
font-size:14px;
font-family:Arial;
color:#666666;
text-decoration:none;
height:55px;
text-align:center;
padding:0px 0px 0px 0px;
border-right:1px #CCCCCC solid;
font-weight:bold;
}
.s{ color:#999999;
}
#menu_top a:hover{
background-image:url(images/cn.gif);


}

#m{width:120px;
}
#m1{width:120px;}
#m2{width:120px;}
#m3{width:120px;}
#m4{width:120px;}



<div id="menu_top">
<a href="index-4.html" id="m">Contact Us</a>
<a href="index-1.html" id="m1" class="active">About Us</a>
<a href="index-2.html" id="m2">Services</a>
<a href="index-3.html" id="m3">Clients</a>
<a href="index-4.html" id="m4">Contact Us</a> </div>
</div>

<a href="index-4.html" id="m" style='position: relative' onmouseover="this.style.top='10px';">Contact Us</a> --- с яваскриптом можно и на css